Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thuat » trong thuat, thuong thuat, trung tuan
thuat dung » thuat hung, thuat ung, thuat xung
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
doc hieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) cach - thanh trung thuat dung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) cach - thanh trung thuat dung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) cach - thanh trung thuat dung cong tan tran cau*.